From patchwork Wed Oct 6 17:31:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Kara X-Patchwork-Id: 12539935 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7B922C433F5 for ; Wed, 6 Oct 2021 17:32:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 66EF4610C8 for ; Wed, 6 Oct 2021 17:32:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238932AbhJFRd5 (ORCPT ); Wed, 6 Oct 2021 13:33:57 -0400 Received: from smtp-out2.suse.de ([195.135.220.29]:41960 "EHLO smtp-out2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238424AbhJFRdv (ORCPT ); Wed, 6 Oct 2021 13:33:51 -0400 Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out2.suse.de (Postfix) with ESMTP id CF80C1FEE8; Wed, 6 Oct 2021 17:31:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1633541517; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Q47AY5VQrvEGE/dtkE+SbOD8ZnK0Nig+WIn3fo5CDsc=; b=0Q+0aB5nkDd4OIQR/NdffdXTgDNpqRu9a9Y11WLdMXWrmC0AiY/XA4s9eqpWyEP9PTxtm8 usjmzP5msVQhFH/5rcuroIYV72WVKv7gYe7603hAXtcLLPqtfIX/zMLs9nyn7ZWHn7mhOs w9ZeyencsQINFwsOyhkHP3gUuCTrVug= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1633541517; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Q47AY5VQrvEGE/dtkE+SbOD8ZnK0Nig+WIn3fo5CDsc=; b=lGd5hUc5mt7u3TRJS3q+FuUYuGFrr4kXjAdC6bJOrhwariu3ctf7oDmpCUpcPCTf3BpKEI ddILi8MjEPP7v+CA== Received: from quack2.suse.cz (unknown [10.163.28.18]) by relay2.suse.de (Postfix) with ESMTP id B75E4A3B8B; Wed, 6 Oct 2021 17:31:57 +0000 (UTC) Received: by quack2.suse.cz (Postfix, from userid 1000) id 5D7F01E0BEA; Wed, 6 Oct 2021 19:31:57 +0200 (CEST) From: Jan Kara To: Paolo Valente Cc: , Jens Axboe , =?utf-8?q?M?= =?utf-8?q?ichal_Koutn=C3=BD?= , Jan Kara Subject: [PATCH 1/8] block: Provide icq in request allocation data Date: Wed, 6 Oct 2021 19:31:40 +0200 Message-Id: <20211006173157.6906-1-jack@suse.cz> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20211006164110.10817-1-jack@suse.cz> References: <20211006164110.10817-1-jack@suse.cz> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3457; h=from:subject; bh=BYzZGv61PbCxlfaIVFX4SHKjjCdlJNJtgeK7qNnI2NI=; b=owEBbQGS/pANAwAIAZydqgc/ZEDZAcsmYgBhXd18lT2/RHsaVreMm4V3vtk5IUcUrST0OFYBRNfG Ih25lM+JATMEAAEIAB0WIQSrWdEr1p4yirVVKBycnaoHP2RA2QUCYV3dfAAKCRCcnaoHP2RA2avUB/ 4nWd9yBmbmj6eYXrcvjvAFyT/+EBqkQlTC9yFzN0x9VnWlpxqs/+1QVol7N+t/eOqNGxo37PzIrwn9 JjyzAOXGZIEErFKyQeQxVTD94ufB3TWjMGLhv9xkaISIS8TBHnTd81EgHVxO4qHptP4RbNpEX2n/z+ 2eXQL8/OfSI701nj4yVPkAke6LelZPDzQJjlZ0p/WIPVH2nDrO0Ga3b6d4BO6hze7WwoxqARKFGz5/ H/cJzxppNmYUz1IFCzpf7glQ2VIejIZdW68WKkUdr0j/SAaOBQw+0F2d2d4lT90Cs97XatipfIuFM0 pVdG8hDZWgsfMZjwRejlPBU52aE7tR X-Developer-Key: i=jack@suse.cz; a=openpgp; fpr=93C6099A142276A28BBE35D815BC833443038D8C Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Currently we lookup ICQ only after the request is allocated. However BFQ will want to decide how many scheduler tags it allows a given bfq queue (effectively a process) to consume based on cgroup weight. So lookup ICQ earlier and provide it in struct blk_mq_alloc_data so that BFQ can use it. Signed-off-by: Jan Kara --- block/blk-mq-sched.c | 18 ++++++++++-------- block/blk-mq-sched.h | 3 ++- block/blk-mq.c | 7 ++++--- block/blk-mq.h | 1 + 4 files changed, 17 insertions(+), 12 deletions(-) diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c index 0f006cabfd91..bbb6a677fdde 100644 --- a/block/blk-mq-sched.c +++ b/block/blk-mq-sched.c @@ -18,9 +18,8 @@ #include "blk-mq-tag.h" #include "blk-wbt.h" -void blk_mq_sched_assign_ioc(struct request *rq) +struct io_cq *blk_mq_sched_lookup_icq(struct request_queue *q) { - struct request_queue *q = rq->q; struct io_context *ioc; struct io_cq *icq; @@ -29,17 +28,20 @@ void blk_mq_sched_assign_ioc(struct request *rq) */ ioc = current->io_context; if (!ioc) - return; + return NULL; spin_lock_irq(&q->queue_lock); icq = ioc_lookup_icq(ioc, q); spin_unlock_irq(&q->queue_lock); + if (icq) + return icq; + return ioc_create_icq(ioc, q, GFP_ATOMIC); +} - if (!icq) { - icq = ioc_create_icq(ioc, q, GFP_ATOMIC); - if (!icq) - return; - } +void blk_mq_sched_assign_ioc(struct request *rq, struct io_cq *icq) +{ + if (!icq) + return; get_io_context(icq->ioc); rq->elv.icq = icq; } diff --git a/block/blk-mq-sched.h b/block/blk-mq-sched.h index 5246ae040704..4529991e55e6 100644 --- a/block/blk-mq-sched.h +++ b/block/blk-mq-sched.h @@ -7,7 +7,8 @@ #define MAX_SCHED_RQ (16 * BLKDEV_MAX_RQ) -void blk_mq_sched_assign_ioc(struct request *rq); +struct io_cq *blk_mq_sched_lookup_icq(struct request_queue *q); +void blk_mq_sched_assign_ioc(struct request *rq, struct io_cq *icq); bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio, unsigned int nr_segs, struct request **merged_request); diff --git a/block/blk-mq.c b/block/blk-mq.c index 108a352051be..bf7dfd36d327 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -333,9 +333,7 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data, rq->elv.icq = NULL; if (e && e->type->ops.prepare_request) { - if (e->type->icq_cache) - blk_mq_sched_assign_ioc(rq); - + blk_mq_sched_assign_ioc(rq, data->icq); e->type->ops.prepare_request(rq); rq->rq_flags |= RQF_ELVPRIV; } @@ -360,6 +358,9 @@ static struct request *__blk_mq_alloc_request(struct blk_mq_alloc_data *data) data->flags |= BLK_MQ_REQ_NOWAIT; if (e) { + if (!op_is_flush(data->cmd_flags) && e->type->icq_cache && + e->type->ops.prepare_request) + data->icq = blk_mq_sched_lookup_icq(q); /* * Flush/passthrough requests are special and go directly to the * dispatch list. Don't include reserved tags in the diff --git a/block/blk-mq.h b/block/blk-mq.h index d08779f77a26..c502232384c6 100644 --- a/block/blk-mq.h +++ b/block/blk-mq.h @@ -151,6 +151,7 @@ static inline struct blk_mq_ctx *blk_mq_get_ctx(struct request_queue *q) struct blk_mq_alloc_data { /* input parameter */ struct request_queue *q; + struct io_cq *icq; blk_mq_req_flags_t flags; unsigned int shallow_depth; unsigned int cmd_flags;